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Natural Numbers and the Strong Goldbach Conjecture
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作者 Ramon Carbó-Dorca 《Journal of Applied Mathematics and Physics》 2024年第9期3208-3236,共29页
This study introduces the representation of natural number sets as row vectors and pretends to offer a new perspective on the strong Goldbach conjecture. The natural numbers are restructured and expanded with the incl... This study introduces the representation of natural number sets as row vectors and pretends to offer a new perspective on the strong Goldbach conjecture. The natural numbers are restructured and expanded with the inclusion of the zero element as the source of a strong Goldbach conjecture reformulation. A prime Boolean vector is defined, pinpointing the positions of prime numbers within the odd number sequence. The natural unit primality is discussed in this context and transformed into a source of quantum-like indetermination. This approach allows for rephrasing the strong Goldbach conjecture, framed within a Boolean scalar product between the prime Boolean vector and its reverse. Throughout the discussion, other intriguing topics emerge and are thoroughly analyzed. A final description of two empirical algorithms is provided to prove the strong Goldbach conjecture. 展开更多
关键词 Natural Numbers Prime Numbers Vector Description of Natural Numbers Prime Boolean Vectors Primality of the Natural Unit strong Goldbach’s conjecture Vector Reversal Pairing conjecture Natural Matrix squeezing
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一期经皮肾镜联合软镜治疗Guy’sⅢ~Ⅳ级肾结石的临床疗效
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作者 廖文成 李优苼 +1 位作者 赖颖 陈蓉 《当代医学》 2024年第9期136-139,共4页
目的探讨一期经皮肾镜联合软镜治疗Guy’sⅢ~Ⅳ级肾结石患者的临床疗效。方法选取2021年8月至2022年2月赣县区人民医院泌尿外科收治的60例Guy’sⅢ~Ⅳ级肾结石患者作为研究对象,按照随机数字表法分为对照组与观察组,各30例。对照组采用... 目的探讨一期经皮肾镜联合软镜治疗Guy’sⅢ~Ⅳ级肾结石患者的临床疗效。方法选取2021年8月至2022年2月赣县区人民医院泌尿外科收治的60例Guy’sⅢ~Ⅳ级肾结石患者作为研究对象,按照随机数字表法分为对照组与观察组,各30例。对照组采用经皮肾镜治疗,观察组采用一期经皮肾镜联合软镜治疗,比较两组手术指标、生化指标及并发症发生情况。结果两组术中出血量比较差异无统计学意义;观察组手术时间、住院时间均短于对照组,住院费用少于对照组,术后残留结石率和二次手术取石术率均低于对照组,差异有统计学意义(P<0.05)。术后7d,观察组血红蛋白水平高于对照组,血白细胞、尿白细胞与血肌酐水平均低于对照组,差异有统计学意义(P<0.05)。两组并发症发生率比较差异无统计学意义。结论一期经皮肾镜联合软镜治疗Guy’sⅢ~Ⅳ级肾结石患者疗效显著,能缩短患者住院时间,减少住院费用,降低二次手术取石率,改善患者肾功能,且不增加并发症发生率,值得临床推广应用。 展开更多
关键词 一期经皮肾镜 软镜 guysⅢ~Ⅳ级肾结石 结石残留 二次取石
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The Proofs of Legendre’s Conjecture and Three Related Conjectures
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作者 Wing K. Yu 《Journal of Applied Mathematics and Physics》 2023年第5期1319-1336,共18页
In this paper, we prove Legendre’s conjecture: There is a prime number between n<sup>2</sup> and (n +1)<sup>2</sup> for every positive integer n. We also prove three related conjectures. The m... In this paper, we prove Legendre’s conjecture: There is a prime number between n<sup>2</sup> and (n +1)<sup>2</sup> for every positive integer n. We also prove three related conjectures. The method that we use is to analyze binomial coefficients. It is developed by the author from the method of analyzing binomial central coefficients, that was used by Paul Erdős in his proof of Bertrand’s postulate - Chebyshev’s theorem. 展开更多
关键词 Legendre’s conjecture Bertrand’s Postulate - Chebyshev’s Theorem Oppermann’s conjecture Brocard’s conjecture Andrica’s conjecture
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基于PI方法的华北2019年以来3次M_(S)≥5.0地震回溯性预测研究
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作者 宋程 张永仙 +4 位作者 夏彩韵 毕金孟 张小涛 吴永加 徐小远 《地震》 CSCD 北大核心 2024年第2期120-134,共15页
本文应用图像信息(PI)方法对2023年山东平原M_(S)5.5地震、2021年江苏大丰海域M_(S)5.0地震和2020年河北古冶M_(S)5.1地震进行了回溯性预测研究。以华北局部(32°N~42°N,114°E~122°E)为研究区域,在网格尺度分别为0.5... 本文应用图像信息(PI)方法对2023年山东平原M_(S)5.5地震、2021年江苏大丰海域M_(S)5.0地震和2020年河北古冶M_(S)5.1地震进行了回溯性预测研究。以华北局部(32°N~42°N,114°E~122°E)为研究区域,在网格尺度分别为0.5°×0.5°和1.0°×1.0°且预测窗长为5 a的两组参数模型下,获取2019—2027年逐年滑动的预测窗热点演化图像。结果显示,当网格尺度为1.0°×1.0°时,PI热点效果优于0.5°×0.5°网格,且对平原地震和大丰海域地震的发震位置指示作用较好。当时间窗长和归一化阈值绝对值同时增大,个别窗口存在古冶地震的有效热点,但未找到热点能同时覆盖3个地震震中所在网格的参数模型。不同参数模型下的PI热点显示,未来3~4 a郯庐断裂带渤海段存在发生M_(S)≥5.0地震的风险。本文研究结果对于华北局部地区M_(S)≥5.0地震危险性分析具有一定的参考意义。 展开更多
关键词 2023年平原M_(s)5.5地震 2021年大丰海域Ms5.0地震 2020年古冶Ms5.1地震 图像信息方法 热点迁移
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文安和古冶2次M_(S)5.1地震活动特征对比
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作者 宋程 张永仙 +1 位作者 夏彩韵 孙路强 《华北地震科学》 2024年第3期83-90,共8页
对2006年文安M_(S)5.1地震和2020年古冶M_(S)5.1地震前的异常平静图像、区域-时间-长度(RTL)曲线、地震图像信息(PI)热点进行了对比分析。研究结果表明:①2次M_(S)5.1地震前存在不同程度的时空平静异常图像;②RTL方法显示,文安地震前半... 对2006年文安M_(S)5.1地震和2020年古冶M_(S)5.1地震前的异常平静图像、区域-时间-长度(RTL)曲线、地震图像信息(PI)热点进行了对比分析。研究结果表明:①2次M_(S)5.1地震前存在不同程度的时空平静异常图像;②RTL方法显示,文安地震前半年存在显著平静异常,古冶地震前半年内未出现平静异常;③PI方法显示,在3年预测窗长和0.1°×0.1°网格尺度下,2次地震的震中附近皆存在热点,文安地震的有效热点相比于古冶地震对地点指示意义更好,发震风险性更高。该研究对华北地区M_(S)5.0以上地震活动特征总结和地震危险性评估具有一定的参考意义。 展开更多
关键词 文安M_(s)5.1地震 古冶M_(s)5.1地震 平静异常 RTL方法 PI方法
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Inequalities relating to L_p-version of Petty's conjectured projection inequality 被引量:1
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作者 王卫东 冷岗松 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2007年第2期269-276,共8页
Petty's conjectured projection inequality is a famous open problem in the theory of convex bodies. In this paper, it is shown that an inequality relating to Lp-version of the Petty's conjectured projection inequalit... Petty's conjectured projection inequality is a famous open problem in the theory of convex bodies. In this paper, it is shown that an inequality relating to Lp-version of the Petty's conjectured projection inequality is developed by using the notions of the Lp-mixed volume and the Lp-dual mixed volume, the relation of the Lp-projection body and the geometric body Г-pK, the Bourgain-Milman inequality and the Lp-Bnsemann-Petty inequality. In addition, for each origin-symmetric convex body, by applying the Jensen inequality and the monotonicity of the geometric body Г-pK, the reverses of Lp-version of the Petty's conjectured projection inequality and the Lp-Petty projection inequality are given, respectively. 展开更多
关键词 Lp-version Petty projection inequality Petty's conjectured projectioninequality Lp-projection body REVERsE
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A NEW RESULT ON ERDS-SóS CONJECTURE
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作者 王敏 赵艳青 李国君 《数学物理学报(A辑)》 CSCD 北大核心 1997年第S1期125-131,共7页
Erdosa and Sós conjectured in 1963 that if G is a graph o ofof ordeq >1/2p(k - 1), then G contains every tree of size k. It is shown in this paper that the conjecture is true if the complement G of G contains ... Erdosa and Sós conjectured in 1963 that if G is a graph o ofof ordeq >1/2p(k - 1), then G contains every tree of size k. It is shown in this paper that the conjecture is true if the complement G of G contains no a copy of K3 as an induced subgraph of G. 展开更多
关键词 packing IsOMORPHIC graphs. Erd■s-sós conjecture
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Some New Results on Terai's Conjecture
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作者 曹珍富 董晓蕾 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1998年第4期1-3,共3页
Terai presented the following conjecture: Ifa2 + b2 = c2 vith a, b, c ∈ N, gcd (a, b, c) = 1 and a even, then the diophantine equation x2 + bm = cn has the only peitive integral solution (x, m, n ) = (a,2, 2). In thi... Terai presented the following conjecture: Ifa2 + b2 = c2 vith a, b, c ∈ N, gcd (a, b, c) = 1 and a even, then the diophantine equation x2 + bm = cn has the only peitive integral solution (x, m, n ) = (a,2, 2). In this paper we prove that if c is a prime power, b 1 (mod 8) and b 1 (mod 16) if b2 + 1 = 2c, then Terai’s conjecture holds. 展开更多
关键词 Terai’s conjecture EXPONENTIAL DIOPHANTINE EQUATION imaginary QUADRATIC field
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A Simple and General Proof of Beal’s Conjecture (I)
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作者 Golden Gadzirayi Nyambuya 《Advances in Pure Mathematics》 2014年第9期518-521,共4页
Using the same method that we used in [1] to prove Fermat’s Last Theorem in a simpler and truly marvellous way, we demonstrate that Beal’s Conjecture yields—in the simplest imaginable manner, to our effort to prove... Using the same method that we used in [1] to prove Fermat’s Last Theorem in a simpler and truly marvellous way, we demonstrate that Beal’s Conjecture yields—in the simplest imaginable manner, to our effort to prove it. 展开更多
关键词 Fermat’s LAsT THEOREM Beal’s conjecture PROOF
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On the Four Conjectures of G G Lorentz Type in L_ρ~2[-a,a]
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作者 王元恒 杨文善 《Chinese Quarterly Journal of Mathematics》 CSCD 2009年第3期343-348,共6页
In the space C[-1,1],G G Lorentz proposed four conjectures on the properties of the polynomials of the best approximation in 1977,1978 and 1980.The present paper transplants the four conjectures in the space Lρ2[-a,a... In the space C[-1,1],G G Lorentz proposed four conjectures on the properties of the polynomials of the best approximation in 1977,1978 and 1980.The present paper transplants the four conjectures in the space Lρ2[-a,a] and proves them being all right in only one theorem under the corresponding conditions,although each of the original conjectures is very difficulty. 展开更多
关键词 best approximation Lorentz's conjecture different norms property of polynomial
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Some notes on a conjecture of Zygmund
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作者 CHEN Jie-cheng ZHANG Chun-jie 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2008年第2期213-218,共6页
In this paper, some classes of differentiation basis are investigated and several positive answers to a conjecture of Zygmund on differentiation of integrals are presented.
关键词 Zygmund's conjecture differentiation of integrals maximal function.
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Scholz’s Third Conjecture: A Demonstration for Star Addition Chains
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作者 José Maclovio Sautto Vallejo Agustín Santiago Moreno +1 位作者 Carlos N. Bouza Herrera Verónica Campos Guzmán 《Applied Mathematics》 2013年第10期1-2,共2页
This paper presents a brief demonstration of Scholz’s third conjecture [1] for n numbers such that their minimum chain addition is star type [2]. The demonstration is based on the proposal of an algorithm that takes ... This paper presents a brief demonstration of Scholz’s third conjecture [1] for n numbers such that their minimum chain addition is star type [2]. The demonstration is based on the proposal of an algorithm that takes as input the star-adding chain of a number n, and returns a string in addition to x = 2n - 1??of length equal to l (n) + n - 1. As for any type addition chain star of a number n, this chain is minimal demonstrates the Scholz’s third Conjecture for such numbers. 展开更多
关键词 ADDITION CHAIN EXPONENTIATION short CHAIN scholz’s conjecture
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Scholz’s First Conjecture: A Brief Demonstration
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作者 José M. Sautto +3 位作者 Agustín Santiago Carlos N. Bouza Veró nica Campos 《Applied Mathematics》 2016年第1期70-76,共7页
This paper presents a brief demonstration of Schulz’s first conjecture, which sets the upper and lower limits on the length of the shortest chain of addition. Two methods of the upper limit are demonstrated;the secon... This paper presents a brief demonstration of Schulz’s first conjecture, which sets the upper and lower limits on the length of the shortest chain of addition. Two methods of the upper limit are demonstrated;the second one is based on the algorithm of one of the most popular methods for obtaining addition chains of a number, known as the binary method. 展开更多
关键词 Addition Chain EXPONENTIATION short Chain scholz’s conjecture Binary Method
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The Proof of Goldbach’s Conjecture on Prime Numbers
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作者 Silviu Guiasu 《Natural Science》 2019年第9期273-283,共11页
Goldbach’s Conjecture (“Every even positive integer strictly larger than 4 is the sum of two primes”) has remained unproven since 1742. This paper contains the proof that every positive composite integer n strictly... Goldbach’s Conjecture (“Every even positive integer strictly larger than 4 is the sum of two primes”) has remained unproven since 1742. This paper contains the proof that every positive composite integer n strictly larger than 3, is located at the middle of the distance between two primes, which implicitly proves Goldbach’s Conjecture for 2n as well. 展开更多
关键词 PROOF of Goldbach’s conjecture Hidden symmetry of PRIMEs Matching PRIMEs and Composite INTEGERs Arranging ODD INTEGERs in Frames The Existence and the Number of GOLDBACH solutions
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Remarks on Goldbach’s Conjecture on Prime Numbers
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作者 Silviu Guiasu 《Natural Science》 2019年第12期336-344,共9页
The oldest Goldbach’s Conjecture (“Every even positive integer strictly larger than 4 is the sum of two primes”) has remained unproven since 1742. The recent proof [1] connected Goldbach’s Conjecture with the fact... The oldest Goldbach’s Conjecture (“Every even positive integer strictly larger than 4 is the sum of two primes”) has remained unproven since 1742. The recent proof [1] connected Goldbach’s Conjecture with the fact that every positive composite integer n strictly larger than 3, is located at the middle of the distance between two primes. The present paper contains explicit additional and complementary details of the proof, insisting on the existence and the number of Goldbach’s representations of even positive integers as sums of pairs of primes. 展开更多
关键词 The Existence and the Number of GOLDBACH solutions The Proof of Goldbach’s conjecture Hidden symmetry of PRIMEs Matching PRIMEs and ODD Composite INTEGERs Arranging ODD INTEGERs in Frames
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Solutions to Beal’s Conjecture, Fermat’s Last Theorem and Riemann Hypothesis
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作者 A. C. Wimal Lalith de Alwis 《Advances in Pure Mathematics》 2016年第10期638-646,共9页
A Simple Mathematical Solutions to Beal’s Conjecture and Fermat’s Marginal Conjecture in his diary notes, Group Theoretical and Calculus Solutions to Fermat’s Last theorem & Integral Solution to Riemann Hypothe... A Simple Mathematical Solutions to Beal’s Conjecture and Fermat’s Marginal Conjecture in his diary notes, Group Theoretical and Calculus Solutions to Fermat’s Last theorem & Integral Solution to Riemann Hypothesis are discussed. 展开更多
关键词 Beal’s conjecture Fermat’s Last Theorem Riemann Hypothesis
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On resolution to Wu's conjecture on Cauchy function's exterior singularities
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作者 Theodore Yaotsu Wu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第3期309-317,共9页
This is a series of studies on Wu's conjecture and on its resolution to be presented herein. Both are devoted to expound all the comprehensive properties of Cauchy's function f(z) (z = x + iy) and its integral ... This is a series of studies on Wu's conjecture and on its resolution to be presented herein. Both are devoted to expound all the comprehensive properties of Cauchy's function f(z) (z = x + iy) and its integral J[f(z)]≡(2πi)-∮cf(t)(t-z)-1dt taken along the unit circle as contour C,inside which(the open domain D+) f(z) is regular but has singularities distributed in open domain Doutside C. Resolution is given to the inverse problem that the singularities of f(z) can be determined in analytical form in terms of the values f(t) of f(z) numerically prescribed on C(|t| = 1) ,as so enunciated by Wu's conjecture. The case of a single singularity is solved using complex algebra and analysis to acquire the solution structure for a standard reference. Multiple singularities are resolved by reducing them to a single one by elimination in principle,for which purpose a general asymptotic method is developed here for resolution to the conjecture by induction,and essential singularities are treated with employing the generalized Hilbert transforms. These new methods are applicable to relevant problems in mathematics,engineering and technology in analogy with resolving the inverse problem presented here. 展开更多
关键词 Keywords Cauchy function. singularity distribution . Wu's conjecture - Resolution by induction
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Group-Theoretic Remarks on Goldbach’s Conjecture
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作者 Liguo He Gang Zhu 《Advances in Pure Mathematics》 2022年第11期624-637,共14页
The famous strongly binary Goldbach’s conjecture asserts that every even number 2n ≥ 8 can always be expressible as a sum of two distinct odd prime numbers. We use a new approach to dealing with this conjecture. Spe... The famous strongly binary Goldbach’s conjecture asserts that every even number 2n ≥ 8 can always be expressible as a sum of two distinct odd prime numbers. We use a new approach to dealing with this conjecture. Specifically, we apply the element order prime graphs of alternating groups of degrees 2n and 2n &#8722;1 to characterize this conjecture, and present its six group-theoretic versions;and further prove that this conjecture is true for p +1 and p &#8722;1 whenever p ≥ 11 is a prime number. 展开更多
关键词 Alternating Group Element Order Prime Graph Goldbach’s conjecture CENTRALIZER
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2020年古冶M_(S)5.1地震前后岩石圈磁场变化特征
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作者 张娜 龚燕民 苏树朋 《地震地磁观测与研究》 2024年第2期60-67,共8页
总结归纳河北及邻近地区2014年以来4级以上中强地震震兆异常特征位置,结合2020年古冶M_(S)5.1地震发生前后岩石圈磁场H矢量、D、F总场3个要素地磁异常变化图像,分析发震前后岩石圈磁场震兆异常变化特征。结果表明:①河北及邻近地区7个M... 总结归纳河北及邻近地区2014年以来4级以上中强地震震兆异常特征位置,结合2020年古冶M_(S)5.1地震发生前后岩石圈磁场H矢量、D、F总场3个要素地磁异常变化图像,分析发震前后岩石圈磁场震兆异常变化特征。结果表明:①河北及邻近地区7个M≥4地震均发生在岩石圈磁场各地磁要素0值线附近的高梯级带、0值线附近及矢量方向转向等特征部位;②古冶M_(S)5.1地震符合河北中强地震岩石圈磁场震兆异常空间位置特征,概率达75%;③丰南M_(S)4.5地震后唐山岩石圈磁场异常区异常特征出现增强,原地震危险区有再次发震的可能。 展开更多
关键词 岩石圈磁场 流动地磁 2019年丰南M_(s)4.5地震 2020年古冶M_(s)5.1地震
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肾结石S.T.O.N.E.评分与Guy's分级预测经皮肾镜取石术后结石残留的比较 被引量:9
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作者 潘俊 代睿欣 +1 位作者 王昭辉 白遵光 《广东医学》 CAS 北大核心 2016年第20期3065-3068,共4页
目的对比肾结石S.T.O.N.E.评分与Guy's分级预测经皮肾镜取石术后结石残留的准确性。方法回顾性分析收治的156例因肾结石行经皮肾镜取石术患者的临床资料并根据患者术前CT进行S.T.O.N.E.评分与Guy's分级,分析S.T.O.N.E.评分与Guy... 目的对比肾结石S.T.O.N.E.评分与Guy's分级预测经皮肾镜取石术后结石残留的准确性。方法回顾性分析收治的156例因肾结石行经皮肾镜取石术患者的临床资料并根据患者术前CT进行S.T.O.N.E.评分与Guy's分级,分析S.T.O.N.E.评分与Guy's分级与结石残留、手术时间、估计失血量等临床数据的关系并比较S.T.O.N.E.评分与Guy's分级预测经皮肾镜取石术后结石残留的准确性。结果 156例患者结石残留共70例(44.9%),结石残留患者与无残留患者S.T.O.N.E.评分分别为8.81±1.30和7.49±1.46(P=0.000),Guy's分级分别为3.23±0.78和2.31±0.84(P=0.000)。线性回归模型检验S.T.O.N.E.评分与Guy's分级与估计失血量(P=0.009,0.000)、手术时间(均P=0.000)均明显相关。logistic回归分析S.T.O.N.E.评分和Guy's分级均与经皮肾镜取石术后结石残留状态明显相关(OR=1.94,P=0.000;OR=3.63,P=0.000),ROC分析两者预测术后结石残留准确性无明显区别,AUC分别为0.750和0.773(P=0.608)。结论肾结石S.T.O.N.E.评分与Guy's分级法均可有效预测经皮肾镜取石术后结石残留状态,两者预测的准确性无明显区别。 展开更多
关键词 肾结石 经皮肾镜取石术 guys分级 s.T.O.N.E.评分
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